Deep-Cheep

From the Super Mario Wiki

A Deep-Cheep is a special variety of Cheep-Cheep found in New Super Mario Bros. Unlike regular Cheep-Cheeps, these fish are green and will actively hunt Mario and Luigi down in the underwater levels. Deep-Cheeps will only give up the pursuit after the plumbers swim far enough away.

Cheep-Cheeps
???? | Baby Cheep | Blurp (SMW) | Blurp (YS) | Big Bertha | Boss Bass | Bub | Bubba | Cheep-Chomp | Deep-Cheep | Flopsy Fish | Fishbone | Goby | Jean de Fillet | Mega Cheep-Cheep | Mega Deep-Cheep | Mr. Kipper | Porcu-Puffer | Puffer-Cheep | Rip Van Fish | Sad Cheep Cheep | Spiny Cheep-Cheep
Cheep-Cheep Characters
Bessie Bass | Cheep-Cheep Pufferfish | Cheepskipper | Chef Shimi | Sashimie | Sushie | Stewart

Fish Characters Bessie Bass | Bubbles | Captain Gills | Cheep-Cheep Pufferfish | Cheepskipper | Chef Shimi | Eely Mouth | Enguarde the Swordfish | Gills Jr. | Gills II | Gills III | Gills IV | Gills V | Glimmer the Anglerfish | Jonathan Jones | Kenneth | Kingfin | Manta | Puftoss | Ray | Red Coin Fish | Stanley the Talking Fish | Stewart | Sushie | Unagi the Eel

Fish Species ???? | Angler Mangler | Baby Cheep | Bandana Blue | Bandana Red | Battle Salmon | Bazza | Big Bertha | Bitesize | Bittacuda | Blurp | Blurp (Yoshi's Story) | Boss Bass | Bounty Bass | Bub | Bubba | Cheep-Cheep | Chomps | Chomps Jr. | Cowfish | Deep-Cheep | Fangfish | Fish | Fishbone | Flopsy Fish | Fly Fish | Gleamin' Bream | Goby | Gringill | Honen | Jean de Fillet | Joe | Koco | Loch Nestor | Lockjaw | Lunge Fish | Mad Blurp | Mega Cheep-Cheep | Mega Deep-Cheep | Mega Unagi | Mr. Eel | Mr. Kipper | Nibbla | Nibbles | Piscatory Pete | Porcu-Puffer | Puffer-Cheep | Puftup | Rip Van Fish | Sad Cheep Cheep | Snapjaw | Spike Bass | Spiny Cheep-Cheep | Spiny Fish | Spray Fish | Sushi | Swordfish | Torion | Trouter | Unagi